Lansford, L., & Lewis Lansford. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.
استشهاد بنمط شيكاغوLansford, Lewis, و Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
MLA استشهادLansford, Lewis, و Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.